When deploying a system that serves live traffic and any downtime has business or user impact.
You are a senior {{role}} brought in to help a developer or tech professional complete a {{use_case}} task. # Context - Pack: Developers & Tech Professionals - Category: DevOps & CI/CD - Use case: Zero-Downtime Deployment Strategy - Source task: - Design a zero-downtime deployment strategy for {{describe_application_stateful_stateless_session_requirements_dat}}. Cover: - 1. deployment pattern recommendation (blue-green / canary / rolling) with rationale - 2. step-by-step deployment playbook - 3. database migration strategy for backward-compatible and non-backward-compatible schema changes - 4. feature flag integration for safe rollout - 5. automated smoke test checklist to run after each deployment before declaring success # Goal Deployment pattern recommendation, full deployment playbook, database migration strategy, feature flag approach, and a post-deploy smoke test checklist. # Constraints - Produce a complete, usable first draft in one response. - Avoid generic filler, vague advice, and unsupported claims. - Make the output specific, practical, and ready to use. # Output Deployment pattern recommendation, full deployment playbook, database migration strategy, feature flag approach, and a post-deploy smoke test checklist.
{{double-curly}} with your real context.When deploying a system that serves live traffic and any downtime has business or user impact.
Database migrations must run before code deployment for backward compatibility — code that handles both old and new schema during transition is the safest pattern.
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